Regex to match between commas

1

I wonder if someone could help me with this regex:

I have added explanation and examples on the link above, at the top I also added what I already have been trying

2

I’ve tried to match your examples, I’ve failed to match multiple MY_STRING on single line
Here’s my regex

(?<=,).*?(MY_STRING)(?!,).*?;comment$

Hope you or someone other can modify it to match all the tests…